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Sparks seen from rocket as ULA Vulcan launches from Florida Thursday
- philipwhiuk 8mo agoWhile Northrop Grumman will have extensively tested the nozzle and design following the issue on the Cert-2 flight this probably points to either a condition only seen with one or more of the following: * vertical * with lower atmospheric pressure * due to a harmonic induced by being attached to the rest of the vehicle all of which are not practical for them to replicate with the current test stands. The nozzle split location was different which maybe incidental or a result of the changes made after Cert-2. It also could mean it's unpredictable which might mean they were just lucky a couple of times.